I'm trying to plot some streets with a Geojson using Choroplethmapbox

šŸ“Š Plotly Python
1

Iā€™m trying to plot some streets with a Geojson using Choroplethmapbox, however, nothing is displayed in the graph, Iā€™m using the following function

def map_links():
    from urllib.request import urlopen
    import json
    with open('emme_links_geojson.json') as f:
        counties = json.load(f)

    import pandas as pd
    df = pd.read_csv("coordinate_table.csv")

    import plotly.graph_objects as go

    fig = go.Figure(go.Choroplethmapbox(geojson=counties, locations=df.ID, z=df.LENGTH,
                                        colorscale="Viridis", zmin=df.LENGTH.min(), zmax=df.LENGTH.max(),
                                        marker_opacity=0.5, marker_line_width=0))
    fig.update_layout(mapbox_style="carto-positron",
                    mapbox_zoom=10, mapbox_center = {"lat": 6.2259489, "lon": -75.6119972})
    fig.update_layout(margin={"r":0,"t":0,"l":0,"b":0})
    return(fig)

the geojson file looks like this: (In the features array there are more elements)

geojson
geojson518Ɨ608 26.1 KB

My csv file looks like this
table

can someone help me?

2

Looks like the features in your geojson do not have id fields. They should match the ones passed to locations.

3

they have id, it is in the properties dict

id
id800Ɨ677 46.9 KB

4

Then you can use the featureidkey property:

go.Choroplethmapbox(
    # ...,
    featureidkey="properties.ID"
)
5

@andguez

Chroplethmapbox works with Polygon and MultiPolygon geometry, but the streets are representend by LineString and MultipLIneString. They can be plotted as Scattermapbox. See here an answer to a similar question https://community.plotly.com/t/how-to-plot-a-scattermapbox-with-pandas/33393/7